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Feb 24th threat part deux


Typhoon Tip

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This event is not complex. The thermal profile is just borderline. In that sense it is quite simple. The problem that arises is that the public and decision makers don't know what to do with a probabilistic forecast.

For the record, I think the BOX deterministic grids look very reasonable. Elevation will be key in this storm. This is why Jaffrey so often gets the jackpot.

 

It's very complex when you are isothermal for 200mb. Big bust potential. Easiest areas are likely ORH hills and cstl SE MA and the Cape.

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GEFS ensembles weren't too bad.

I know this is the "colder" guidance...but I don't see a reason to sway much from the euro guidance right now. It just seems reasonable, SREFs seem to agree, and they still show the warm tongue rather well..but a little more reasonable than into srn NH like the GFS has. If it busts, than it's likely a result of the storm ending up weaker and more progressive which lessens the CCB impact and flip to snow for areas getting a mix.

00z runs should be interesting. I won't be shocked if they try for a comeback.

Thanks for the info. Gonna be an interesting one to track.

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GEFS ensembles weren't too bad.

 

I know this is the "colder" guidance...but I don't see a reason to sway much from the euro guidance right now. It just seems reasonable, SREFs seem to agree, and they still show the warm tongue rather well..but a little more reasonable than into srn NH like the GFS has. If it busts, than it's likely a result of the storm ending up weaker and more progressive which lessens the CCB impact and flip to snow for areas getting a mix.

 

00z runs should be interesting. I won't be shocked if they try for a comeback.

Srefs are great from about HFD north

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It's odd with the temps tonite..Noone answered my ? and maybe it doesn't matter in re: to the storm..but temps west of ORh are much colder than areas farther east. It's in the teens in NW Ct and the Berks and hills of CT(17.5 here) Forecast low is 19)..but 23 at ORH. Even BDL is colder than ORH.

 

There must have been some sort of unmodeled secondary arctic push today

 

Odd

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Was there some secondary push of cold air today?

 

I saw some forecasts yesterday of temps near 40 today. The high was 26.6

 

it's actually colder now at 18.1 than it was this morning at 18.5..and the winds are ripping.

 

Innteresting anyway

 

It's a bit nipplier down by you than here--interesting.

 

22.2/14 off a high of 25.0

 

Maybe you're stealing the Berks temperatures as well as their snow.

post-462-0-45940900-1361492666_thumb.jpg

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It's odd with the temps tonite..Noone answered my ? and maybe it doesn't matter in re: to the storm..but temps west of ORh are much colder than areas farther east. It's in the teens in NW Ct and the Berks and hills of CT(17.5 here) Forecast low is 19)..but 23 at ORH. Even BDL is colder than ORH.

 

There must have been some sort of unmodeled secondary arctic push today

 

Odd

MOS a couple of days ago was running too warm. It had highs near 40 for both yesterday and today, BUT in the short-term it did re-adjust. MOS this morning had low to mid-30's for CT.

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It's odd with the temps tonite..Noone answered my ? and maybe it doesn't matter in re: to the storm..but temps west of ORh are much colder than areas farther east. It's in the teens in NW Ct and the Berks and hills of CT(17.5 here) Forecast low is 19)..but 23 at ORH. Even BDL is colder than ORH.

 

There must have been some sort of unmodeled secondary arctic push today

 

Odd

I do not remember anyone forecasting winds increasing today with dropping temps either but unrelated to the storm.
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MOS a couple of days ago was running too warm. It had highs near 40 for both yesterday and today, BUT in the short-term it did re-adjust. MOS this morning had low to mid-30's for CT.

But even when you look at the mesomap..look how much colder it is in CNE and WNE as compared to ORH east. I don't think that was modeled or forecast and probably means nothing

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It's very complex when you are isothermal for 200mb. Big bust potential. Easiest areas are likely ORH hills and cstl SE MA and the Cape.

Again this all depends on what value or cost function the end consumer has. If you're consumer cares about wind speed, insolation, humidity, qpf, or temperature this is a high confidence, low risk forecast. You're assuming that all the consumer values is quantitative snow depth. This imparts a strongly nonlinear cost function.

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Again this all depends on what value or cost function the end consumer has. If you're consumer cares about wind speed, insolation, humidity, qpf, or temperature this is a high confidence, low risk forecast. You're assuming that all the consumer values is quantitative snow depth. This imparts a strongly nonlinear cost function.

We have a 30,000 dollar Frito Lay corporate function with 700 people Sat night at the Museum, what's my confidence risk? If this trends even 2 degrees colder and is amped up, what do I do? Prepping has begun and $21,000 worth of food will be ready at 5pm. People are coming from all across SNE. High risk, huge impact to us forecast
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